Oct 14, 2025

US12442608 - Machine gun trigger with select fire

A trigger assembly includes a selector operable between a safe position, a semiautomatic fire position, and an automatic fire position. In one example, the assembly includes a trigger rotatable between a resting position and a pulled position, a disconnector pivotable between a first position where it is in the path of the operational rod, and a second position where it is out of the path of the operational rod. A sear is pivotable between an engaged position and a disengaged position and is biased to the engaged position where it is positioned in the path of the operational rod. A sear link is pivotably connected to the trigger, such that pulling the trigger moves the sear link into contact with the sear to pivot the sear towards the disengaged position. The sear link is spaced from the sear when the trigger is in the resting position.

Assignee: Sig Sauer, Inc.
Inventors: Krzysztof J. Kras, Brian J. Barnhart, Adrian Thomele
Filing date: 2023-05-11

machine guntriggerfirearmselect fire

The patent describes a trigger assembly for firearms that allows for selective firing modes, including safe, semiautomatic, and fully automatic positions. It features a rotatable trigger, a pivotable disconnector, and a biased sear that engages or disengages with the operational rod based on the trigger’s position.

Claim 1

A trigger assembly for a firearm having an operational rod configured to reciprocate longitudinally along a bore axis of the firearm, the trigger assembly comprising: a trigger rotatable between a resting position and a pulled position; a disconnector pivotable between a first position in which a part of the disconnector is in a path of the operational rod and a second position in which the part of the disconnector is out of the path of the operational rod; a sear pivotable between an engaged position and a disengaged position, the sear biased toward the engaged position, wherein in the engaged position a part of the sear is positioned to engage the operational rod; a sear link pivotably connected to the trigger, wherein pulling the trigger moves the sear link into contact with the sear to pivot the sear towards the disengaged position, and wherein the sear link is spaced from the sear when the trigger is in the resting position; and a selector operable between a safe position, a fully automatic fire position, and a semiautomatic fire position. a trigger rotatable between a resting position and a pulled position; a disconnector pivotable between a first position in which a part of the disconnector is in a path of the operational rod and a second position in which the part of the disconnector is out of the path of the operational rod; a sear pivotable between an engaged position and a disengaged position, the sear biased toward the engaged position, wherein in the engaged position a part of the sear is positioned to engage the operational rod; a sear link pivotably connected to the trigger, wherein pulling the trigger moves the sear link into contact with the sear to pivot the sear towards the disengaged position, and wherein the sear link is spaced from the sear when the trigger is in the resting position; and a selector operable between a safe position, a fully automatic fire position, and a semiautomatic fire position.

Google Patents

https://patents.google.com/patent/US12442608

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12442608